A good mother to teenage Jonah and 10-year-old Lacey, Sophie is content to coast along in a faltering marriage, but her husband pushes them to the brink of divorce. Sophie accepts an invitation to spend the summer on Nantucket, but when she and her children arrive, they discover that the cottage has mistakenly been rented to two families. Trevor is a widower with a 4-year-old son, and he and Sophie make a connection that starts as friendship and builds into something more. Mature and thoughtful, Sophie and Trevor won’t rush into a relationship, and there are lots of distractions keeping them apart.